Question

How can decompilers detect whether a certain variable contains a signed or unsigned value?

a.

By examining conditional branches that are based on the value in question

b.

By observing which part of the register is being used

c.

By looking for the MOVZX and MOVSX instructions

d.

None of the above

Posted under Reverse Engineering

Answer: (a).By examining conditional branches that are based on the value in question Explanation:For detecting signed versus unsigned values, the best method is to examine conditional branches that are based on the value in question.

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